Here it is my observation of SW Uma

SW Una 2021 10 12.88931 *11.564* ± 0.017 (V filter)

Best regards.

José Prieto AAM

El mié, 6 oct 2021 a las 21:11, Patrick Schmeer via vsnet-alert (< vsnet-alert@ooruri.kusastro.kyoto-u.ac.jp>) escribió:

SW Ursae Majoris (UGSU) https://www.aavso.org/vsx/index.php?view=detail.top&oid=37127

H. Maehara wrote (vsnet-outburst 27790, see below):

...

Hirosawa-san has reported an outburst of SW UMa ...

The current outburst began shortly before 2021 October 5.558 UT according to recent ASAS-SN Sky Patrol data:

https://asas-sn.osu.edu/sky-patrol/coordinate/22d13753-1a79-4a41-90c0-2e3dad... UMASW 20211002.590 16.568g ASN UMASW 20211005.558 12.255g ASN UMASW 20211005.559 12.261g ASN UMASW 20211005.560 12.251g ASN UMASW 20211006.578 10.998g ASN UMASW 20211006.579 10.994g ASN UMASW 20211006.581 10.988g ASN UMASW 20211006.628 11.019g ASN UMASW 20211006.629 11.016g ASN UMASW 20211006.631 11.006g ASN

AAVSO data: https://app.aavso.org/webobs/results/?star=000-BBP-799

ZTF light curves, data, and images (via Lasair): https://lasair.roe.ac.uk/object/ZTF18accnopc https://lasair.roe.ac.uk/object/ZTF20acntest

A previous (super?)outburst was observed in 2020 June.

Time-resolved photometry is encouraged.

Clear skies, Patrick

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References: All-Sky Automated Survey for Supernovae (ASAS-SN) Sky Patrol:

• Shappee et al., 2014ApJ...788...48S
• Kochanek et al., 2017PASP..129j4502K

Lasair:

• Smith et al., 2019RNAAS...3...26S

Zwicky Transient Facility (ZTF):

• Masci et al., 2019PASP..131a8003M

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Hiroyuki Maehara wrote on Tuesday, 5 October 2021 at 23:25:58 UTC:

Hirosawa-san has reported an outburst of SW UMa.

CCD magnitude estimates by VSOLJ members

object YYYYMMDD(UT) mag code UMASW 20211005.79971 10.88cG Hsk.VSOLJ

Observer: Kenji Hirosawa (Aichi, Japan) Instruments: 20cmL + CANON EOS Kiss X9